RECORDING LAYER FOR OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM, AN

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Disclosed are optical information recording layers to create recording marks upon irradiation with a laser beam, in which the recording layers are composed of : an indium alloy containing 0.1 to 15 atomic percent of one or more rare-earth elements; an indium alloy containing 0.1 to 50 atomic percent of one element selected from the group consisting of palladium (Pd), cobalt (Co), platinum (Pt), and vanadium (V); an indium alloy containing 6 to 50 atomic percent of nickel (Ni); or an indium alloy containing 0.1 or more and less than 50 atomic percent of gold (Au). Also disclosed are information storage media provided with the recording layers, and sputtering targets for the deposition of the recording layers, which have the alloy compositions.